Cleaned out the rear diff housing on the 644E, brake plate completely worn away and milled into iron grease.. Scraped it all out by hand and then filled the diff housing with diesel, halfway, then let the gears spin for a while, did that twice to rinse out all the crap. Axle bearings are shot but the differential bearings and gears don't look bad at all. More inspections later.
WOW.. unreal.. iron grease is a GOOD name..
I'm thinking maybe mix it with some gorilla glue and stick it back in all the missing spots! One more wash with diesel to get all the junk out of the housing.
Need some magnets in there to catch the glitter that will hide somewhere....
Great minds, I milled the drain plug to accept a magnet on both diffs and am thinking of pulling the fluid in a couple months and running it through a filter. The fill plug rather sucks, was thinking of extending it with a capped hydraulic line. A couple months would be about 10 -15 hours